Incorporating tillage effects into a soybean model

Andales, Allan A.; Batchelor, William D.; Anderson, Carl E.; Farnham, Dale E.; Whigham, D. K.

doi:10.1016/s0308-521x(00)00037-8

Cited by 44 publications

(31 citation statements)

References 4 publications

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“…1 is around 0.2, which is a relatively high albedo for an agricultural soil (due to the relatively high loam/low organic matter content in this soil). Previously reported in situ (11)(12)(13) and satellite (14,15) measurements suggest that the albedo of brown agricultural soils can be lower than 0.1, whereas soils covered with stubble can have albedos largely above 0.3, implying albedo differences…”

Section: Resultsmentioning

confidence: 98%

Preferential cooling of hot extremes from cropland albedo management

Davin

Seneviratne

Ciais

et al. 2014

Proc. Natl. Acad. Sci. U.S.A.

173

162

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Changes in agricultural practices are considered a possible option to mitigate climate change. In particular, reducing or suppressing tillage (no-till) may have the potential to sequester carbon in soils, which could help slow global warming. On the other hand, such practices also have a direct effect on regional climate by altering the physical properties of the land surface. These biogeophysical effects, however, are still poorly known. Here we show that no-till management increases the surface albedo of croplands in summer and that the resulting cooling effect is amplified during hot extremes, thus attenuating peak temperatures reached during heat waves. Using a regional climate model accounting for the observed effects of no-till farming on surface albedo, as well as possible reductions in soil evaporation, we investigate the potential consequences of a full conversion to no-till agriculture in Europe. We find that the summer cooling from cropland albedo increase is strongly amplified during hot summer days, when surface albedo has more impact on the Earth's radiative balance due to clear-sky conditions. The reduced evaporation associated with the crop residue cover tends to counteract the albedo-induced cooling, but during hot days the albedo effect is the dominating factor. For heatwave summer days the local cooling effect gained from no-till practice is of the order of 2°C. The identified asymmetric impact of surface albedo change on summer temperature opens new avenues for climateengineering measures targeting high-impact events rather than mean climate properties.

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Section: Resultsmentioning

confidence: 98%

Preferential cooling of hot extremes from cropland albedo management

Davin

Seneviratne

Ciais

et al. 2014

Proc. Natl. Acad. Sci. U.S.A.

173

162

View full text Add to dashboard Cite

show abstract

“…However, quantitative description of these effects is often incomplete and difficult to extrapolate for a particular location or soil type to a wide range of situations. One of the few examples of simulation models that predict soil physical properties in relation to soil management practices is reported by Andales et al [2], who developed a 'tillage' model that predicts changes in bulk density and hydraulic conductivity as a function of cumulative rainfall kinetic energy. Besides, for a more comprehensive evaluation of DMC systems other effects on soil surface conditions also need to be included, such as mulch-induced changes in soil temperature and nutrient dynamics.…”

Section: Discussionmentioning

confidence: 99%

Modelling crop residue mulching effects on water use and production of maize under semi-arid and humid tropical conditions

et al. 2004

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-A key principle of direct seeding mulch-based cropping systems is the retention of crop residues on the soil surface to preserve soil water for crop growth. In this study the impact of surface crop residue on water use and production risk associated with rainfall variability is analysed for two contrasting tropical sites. The two sites are La Tinaja in semi-arid Mexico and Planaltina in humid Brazil. The crop growth model STICS, version 3.0 was updated with a simple empirical module, incorporating the following effects of surface residue on soil water balance: (1) rainfall interception and subsequent mulch evaporation; (2) radiation interception with associated reduction of soil evaporation and (3) reduction of surface water runoff. The results of the model simulations showed that the effect of radiation interception at both sites was much more important than the effect of intercepting rain. The high sensitivity of model yield predictions to surface water runoff, especially in La Tinaja, highlighted the importance of a careful parameterisation of the surface water runoff formalism. The model results suggested that even small amounts of surface residue are effective at reducing water loss and increasing yield. In La Tinaja, grain yield was increased at least twofold with retention of 1 Mg ha -1 surface residue. In Planaltina, the advantage of water conservation by surface residue is partly offset by increased drainage losses. As a consequence, the impact of crop residue mulching on grain yield was lower at that site.crop growth model / mulching / climatic risk / surface residue / water balance

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“…The Celone at San Vincenzo sub-basin is situated in mountainous areas characterized by Flyschoid formations. Soils predominantly belong to the class of Entisols [42] or Fluvisols [43] and have a fine clayey-loamy texture, low organic matter content, poor natural fertility and lower water-holding capacity. The Celone watershed is characterized by intensive agriculture.…”

Section: Study Areamentioning

confidence: 99%

Durum Wheat Cover Analysis in the Scope of Policy and Market Price Changes: A Case Study in Southern Italy

et al. 2017

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Agricultural land systems are the result of human interactions with the natural environment, and subjective evidence of socio-economic and environmental interactions has been demonstrated. Nevertheless, it is still difficult to analyze empirically the link between agricultural market and policy, as well as the environmental response due to changes in crop management by local stakeholders. In this study, we propose a cross investigation and analysis to bring the link between vegetation cover, policy, market and farmer's behavior to light. Our methodology is a combination of a rational positive and analogical approach between the quantifiable and non-quantifiable agents on a temporal basis. The method is applied to a dominant mono-crop agricultural watershed in Southern Italy that has been dedicated to durum wheat cultivation. In this region, we studied the relationship between the Common Agricultural Policy (CAP), durum wheat market price, vegetation cover and land allocation. As a first step, we conducted a separate analysis for each factor, exploiting Moderate Resolution Imaging Spectroradiometer (MODIS) satellite observed Leaf Area Index (LAI) to analyze the land vegetation space-time distribution over the period 2000-2014 and three Land Satellite (Landsat) validated images as check-points for the agricultural pattern and CAP's reforms. We used the Farm Accountancy Data Network (FADN) and Eurostat data to investigate the on-farm accountancy and the durum wheat market price changes, respectively. Based on the study period, we developed a storyline of the major relevant CAP's policy changes. In a second step, we conducted a comparative analysis where the CAP's reforms were used as interpretational support, the land allocation and the on-farm accountability for CAP's implementation, the price of durum wheat and the LAI for analytical comparison. We found interesting insights regarding the non-agronomic driving forces of LAI dynamics. The behavior of the individual farmers is influenced by the CAP policy that has been implemented by using profitability as the stimulus for the decision making of the farmer. This explains the correlation of the trend between the market price, the LAI of durum wheat and their associated dynamics.

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Incorporating tillage effects into a soybean model

Cited by 44 publications

References 4 publications

Preferential cooling of hot extremes from cropland albedo management

Preferential cooling of hot extremes from cropland albedo management

Modelling crop residue mulching effects on water use and production of maize under semi-arid and humid tropical conditions

Durum Wheat Cover Analysis in the Scope of Policy and Market Price Changes: A Case Study in Southern Italy

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